perf time-utils: Use skip_spaces()

No change in behaviour intended.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-cpugv7qd5vzhbtvnlydo90jv@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/time-utils.c

 // SPDX-License-Identifier: GPL-2.0
 #include <stdlib.h>
 #include <string.h>
+#include <linux/string.h>
 #include <sys/time.h>
 #include <linux/time64.h>
 #include <time.h>
@@ -141,10 +142,7 @@ static int perf_time__parse_strs(struct perf_time_interval *ptime,
 	for (i = 0, p = str; i < num - 1; i++) {
 		arg = p;
 		/* Find next comma, there must be one */
-		p = strchr(p, ',') + 1;
-		/* Skip white space */
-		while (isspace(*p))
-			p++;
+		p = skip_spaces(strchr(p, ',') + 1);
 		/* Skip the value, must not contain space or comma */
 		while (*p && !isspace(*p)) {
 			if (*p++ == ',') {